Mobile device with a graphical user interface



FIG. 1 is a front view of a first image in a sequence of a mobile device with a graphical user interface, illustrating the new design.

FIG. 2 is a second image thereof;

FIG. 3 is a third image thereof;

FIG. 4 is a fourth image thereof; and,

FIG. 5 is a fifth image thereof.

The outermost broken line illustrates a mobile device, which is the environment of the design, and forms no part of the claim. The remaining broken lines illustrates portions of the graphical user interface that form no part of the claimed design.

The appearance of the image sequentially transitions between the images shown in FIGS. 1 through 5. The process or period in which one image transitions to another forms no part of the claimed design. 

CLAIM The ornamental design for a mobile device with a graphical user interface, as shown and described. 